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What actully is the derivative of a function? What does it represent?

The derivative of a function is simply the gradient of that specific function at a general point, x. However, to actually understand why it is the case that 2x is the derivative of x 2 , and not just by usin...
JW
Answered by James W. • Maths tutor
2759 Views

Expand (x+2)^2

Using the crab claw method:(x+2)(x+2) x(x+2) = x^2 + 2x2(x+2) = 2x + 4Add the total together = x^2 + 4x + 4
LZ
Answered by Laraib Z. • Maths tutor
4058 Views

Factorise fully 3x^2 -48

3x^2 - 48 = 3x(x-16) = 3(x^2-16) = 3(x-4)(x+4)
CM
Answered by Calum M. • Maths tutor
5877 Views

x^2+2=18, find the value of x.

This is a basic rearranging of the equation that easily catches students out and will generally be offered 3 marks. The first thing to do is take the 2 on the other side of the equation so we get x^2=16. Fro...
IP
Answered by Ishaan P. • Maths tutor
3471 Views

3/5 of a number is 162. What is that number?

I would set up an equation where x is the number in question, like so:(3/5) x = 162I would then multiply both sides by 5 which would result in:3x = 162 5 = 810Then, I would divide both sides by 3 to isolate ...
LB
Answered by Luc B. • Maths tutor
5270 Views